New and efficient conditional e-payment systems with transferability

作者：Chen Xiaofeng^*; Li Jin; Ma Jianfeng; Lou Wenjing; Wong Duncan S

来源：Future Generation Computer Systems, 2014, 37: 252-258.

DOI：10.1016/j.future.2013.07.015

• Conditional e-payment
• Blind signatures
• Transferability
• Bilinear pairings

Conditional e-payments (or e-cash) allow the user to anonymously cash a bank-issued e-coin at a future time if and only if a certain agreed-upon public condition is satisfied, which are useful in plenty of applications such as prediction markets, anonymous online betting, and securities trading. In this paper, we propose a new and efficient conditional e-payment system based on Chen et al.'s restrictive partially blind signature scheme. Compared to the existing conditional e-payment schemes [2,5,6], our construction requires neither the inefficient cut-and-choose techniques nor the complicated knowledge proof protocols and thus has lower computation and communication complexity. Another significant contribution of this paper is a conditional e-payment system with transferability which allows the coin to be further transferred anonymously by a chain of payees.

• 单位
  香港城市大学; 西安电子科技大学